[exikyut]

Well, Network Solutions seems(?) to offer 100-year domain registration for $1k ($999).

Thinking about it, a holistic solution to this kind of problem would [categorically need to] be extremely expensive in order to ratelimit demand. Because it's not just "host this for me for a while" with an implicit sort of "maybe let it fall over one day and see if I yell at you" - that 2nd bit is completely removed, and the expectation is 100.0% (amortized, aggregate) uptime... indefinitely.

It's interesting how not even graves last forever. They decay over time (hundreds of years). Not all are maintained.

What sort of "forever" are you talking about? "Most Important Thing™ when the paperclip maximisers take over"?